cp's OEIS Frontend

A072922 Spell English name for n, then interpret as number in base 36.

%I A072922 #15 Feb 16 2025 08:32:46
%S A072922 1652100,31946,38760,49537526,732051,724298,36969,47723135,24375809,
%T A072922 1097258,38111,882492287,1807948346,2310701170991,1229565944111,
%U A072922 33766692143,62095095599,80156542487855,1137277763375,1842973464623,1807950886,84351756569162,84351756575976
%N A072922 Spell English name for n, then interpret as number in base 36.
%C A072922 Base 36 extrapolates the use of the letters of the alphabet as placeholders, as in the more familiar base-16's A, B, C, D, E, F, all the way to Z.
%D A072922 M. J. Halm, Sequences (Re)discovered, Mpossibilities 81 (Aug. 2002).
%H A072922 Landon Curt Noll, <a href="http://www.isthe.com/chongo/tech/math/number/number.html">The English Name of a Number</a>
%H A072922 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Number.html">Number</a>
%H A072922 Robert G. Wilson v, <a href="/A000027/a000027.txt">English names for the numbers from 0 to 11159 without spaces or hyphens </a>.
%H A072922 M. J. Halm, <a href="http://michaelhalm.tripod.com/jootsy.htm">Jootsy Calculus</a>.
%F A072922 In base 36 A = 10, B = 11, ..., Z = 35
%e A072922 a(0) = 1652100 because zero (base 36) = z(36^3) + e(36^2) + r(36) + o = 35(46656) + 14(1296) + 27(36) + 24 = 1632960 + 18144 + 972 + 24 = 1652100 (base 10).
%t A072922 lst = {zero, one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty, twentyone, twentytwo, twentythree, twentyfour, twentyfive, twentysix, twentyseven, twentyeight, twentynine, thirty, thirtyone, thirtytwo, thirtythree, thirtyfour, thirtyfive, thirtysix, thirtyseven, thirtyeight, thirtynine, forty, fortyone, fortytwo, fortythree, fortyfour, fortyfive, fortysix, fortyseven, fortyeight, fortynine, fifty};
%t A072922 f[ls_] := FromDigits[ToString@ls, 36]; f@# & /@ lst (* _Robert G. Wilson v_, Aug 26 2007 *)
%Y A072922 Cf. A038842.
%K A072922 word,base,nonn
%O A072922 0,1
%A A072922 _Michael Joseph Halm_, Aug 19 2002
%E A072922 a(14) and a(17) corrected and more terms from _Sean A. Irvine_, Nov 04 2024