30591

Appears in sequences

• Numbers k such that k | 11^k + 10^k + 9^k + 8^k + 7^k + 6^k + 5^k + 4^k + 3^k + 2^k + 1^k.at n=42A057292
• a(n) is the least k in A002977 with a gap of n. Also n + a(n) is the least k in A007448 which is repeated n times.at n=27A058361
• Consider any concatenation of the type n = concat(a,b). Sequence lists numbers whose reverses are the sum of the products of some of such couples a and b.at n=11A281555
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 478", based on the 5-celled von Neumann neighborhood.at n=15A282485
• Number of (not necessarily maximal) cliques in the n-polygon diagonal intersection graph.at n=20A300524
• Number of distinct lines passing through exactly two points in a triangular grid of side n.at n=28A362014