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 A077305 #6 May 14 2025 18:07:53 %S A077305 4,6,8910,121415,161820212224,25262728303233343, %T A077305 536383940424445464849505152,5455565,758606263,6465666, %U A077305 8697072747576777880818,2848586878890919293949,59698991001021041051061081101111121141151161171181191201 %N A077305 Partition the concatenation 468910121415161820212224252627283032... of composite numbers into successive strings such that the n-th string is a multiple of prime(n) and > prime(n). %e A077305 a(4) = 121415 is a multiple of prime(4) = 7. %Y A077305 Cf. A077293, A077294, A077295, A077296, A077297, A077298, A077299, A077300, A077301, A077302, A077303, A077304. %Y A077305 Cf. A129808. %K A077305 base,nonn %O A077305 1,1 %A A077305 _Amarnath Murthy_, Nov 03 2002 %E A077305 More terms from _Franklin T. Adams-Watters_, May 30 2006