cp's OEIS Frontend

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.

A359304 Oblong numbers which are products of five distinct primes.

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%I A359304 #11 Jan 14 2023 17:35:31
%S A359304 4290,4830,6006,11130,12210,13110,16770,23870,27390,33306,34410,34782,
%T A359304 37830,44310,49062,56406,60762,64770,66822,70490,71022,74802,82082,
%U A359304 84390,95790,101442,103362,104006,109230,119370,125670,127806,133590,137270,148610,151710,158802
%N A359304 Oblong numbers which are products of five distinct primes.
%e A359304 4290 = 65*66 = 2*3*5*11*13.
%e A359304 4830 = 69*70 = 2*3*5*7*23.
%e A359304 6006 = 77*78 = 2*3*7*11*13.
%e A359304 11130 = 105*106 = 2*3*5*7*53.
%t A359304 Select[(#*(# + 1)) & /@ Range[400], FactorInteger[#][[;; , 2]] == {1, 1, 1, 1, 1} &] (* _Amiram Eldar_, Dec 25 2022 *)
%o A359304 (PARI) select(x->((omega(x)==5) && (bigomega(x)==5)), vector(500, k, k*(k+1))) \\ _Michel Marcus_, Dec 25 2022
%Y A359304 Intersection of A002378 and A046387.
%K A359304 nonn
%O A359304 1,1
%A A359304 _Massimo Kofler_, Dec 25 2022