This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A185257 #10 Dec 28 2024 22:09:23 %S A185257 8,23,46,59,108,106,156,182,346,348,542,766,727,717,1071,1153,977, %T A185257 1640,1739,1703,2019,1841,1834,2628,2668,2804,2278,2679,2817,2918, %U A185257 4105,4243,4921,4028,5936,5528,4728,7302,8576,7453,7184,9516,9630,11107,11828,11889,12241 %N A185257 A185243(n) is the a(n)-th triangular number. %C A185257 See A185128 for further information. %D A185257 Albert H. Beiler, Recreations in the theory of numbers, New York, Dover, (2nd ed.) 1966, p. 197, no. 8. %H A185257 N. J. A. Sloane, <a href="/A185128/a185128.jpg">Annotated scan of Beiler's Table 81</a>, based on page 197 of Beiler's "Recreations in the Theory of Numbers: The Queen of Mathematics Entertains", New York, Dover, First ed., 1964. %Y A185257 Cf. A000217, A185128, A185129, A185223, A185233, A185243, A185253, A185258. %K A185257 nonn %O A185257 1,1 %A A185257 _Martin Renner_, Jan 20 2012 %E A185257 Edited (with a simpler definition) by _N. J. A. Sloane_, Dec 28 2024