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 A381697 #12 Mar 06 2025 11:05:13 %S A381697 1,1587474651,1865775531,2223331131,2735465781,2758657521,2955787311, %T A381697 3437557341,3558772551,3575611851,3825477561,4339513471,5216934211, %U A381697 5228577831,5773583721,7358739151,7547751831,7733285751,9553837341,11745456771,11765169751,12646455871 %N A381697 Zeroless integers of the form 10*k+1 such that the 9 integers 10*k+1..10*k+9 all belong to A381631. %o A381697 (PARI) isOne(k) = my(d=digits(k)); ((k*vecprod(d)) % vecsum(d)) == 0; \\ A381631 %o A381697 chk(nn) = for (i=0, nn, my(x=10*i+1, d=digits(x));if (vecmin(d), my(ok=1); for (j=0, 8, if (!isOne(x+j), ok=0; break);); if (ok, print1(x, ", ")););); %Y A381697 Cf. A052382 (zeroless integers), A381631. %K A381697 nonn,base %O A381697 1,2 %A A381697 _Michel Marcus_, Mar 04 2025 %E A381697 a(20)-a(22) from _Jinyuan Wang_, Mar 05 2025