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 A374295 #36 Jul 03 2024 13:06:10 %S A374295 1,7,4,91,2401,28,117649,1729,196,31213,282475249,364,13841287201, %T A374295 1529437,9604,53599,33232930569601,2548,1628413597910449,593047, %U A374295 470596,3672178237,3909821048582988049,6916,68574961,179936733613,33124,29059303,459986536544739960976801,124852 %N A374295 a(n) is the smallest positive integer k such that A096936(k) = n. %C A374295 a(n) is the smallest positive integer k such that A033716(k) = 2*n, %F A374295 If p is prime, a(p) = 7^(p-1). %F A374295 a(n) is divisible by 7 for n > 3. %e A374295 n | a(n) %e A374295 ------------+------------------------------------- %e A374295 2 | 7. %e A374295 3 = 3*1 | 4. %e A374295 4 | 91 = 7 * 13. %e A374295 5 | 2401 = 7^4. %e A374295 6 = 3*2 | 28 = 4 * 7. %e A374295 7 | 117649 = 7^6. %e A374295 8 | 1729 = 7 * 13 * 19. %e A374295 9 = 3*3 | 196 = 4 * 7^2. %e A374295 10 | 31213 = 7^4 * 13. %e A374295 11 | 282475249 = 7^10. %e A374295 12 = 3*4 | 364 = 4 * 7 * 13. %e A374295 13 | 13841287201 = 7^12. %e A374295 14 | 1529437 = 7^6 * 13. %e A374295 15 = 3*5 | 9604 = 4 * 7^4. %e A374295 16 | 53599 = 7 * 13 * 19 * 31. %e A374295 17 | 7^16. %e A374295 18 = 3*6 | 2548 = 4 * 7^2 * 13. %e A374295 19 | 7^18. %e A374295 20 | 593047 = 7^4 * 13 * 19. %e A374295 21 = 3*7 | 470596 = 4 * 7^6. %e A374295 22 | 3672178237 = 7^10 * 13. %e A374295 23 | 7^22. %e A374295 24 = 3*8 | 6916 = 4 * 7 * 13 * 19. %e A374295 25 | 68574961 = 7^4 * 13^4. %e A374295 26 | 179936733613 = 7^12 * 13. %e A374295 27 = 3*9 | 33124 = 4 * 7^2 * 13^2. %e A374295 28 | 29059303 = 7^6 * 13 * 19. %e A374295 29 | 7^28. %e A374295 30 = 3*10 | 124852 = 4 * 7^4 * 13. %Y A374295 Cf. A033716, A096936, A343771. %K A374295 nonn %O A374295 1,2 %A A374295 _Seiichi Manyama_, Jul 02 2024