24510

Appears in sequences

• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^10 in powers of x.at n=27A001488
• If n is composite, replace n with the concatenation of its nontrivial divisors, otherwise a(n) = n.at n=19A037279
• Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 1,3.at n=5A037579
• a(n) = (n+1)*(2^(n+1) - n)/2.at n=11A048470
• Number of symmetric 4 X 4 matrices of nonnegative integers with every row and column adding to n.at n=9A053493
• Numbers n such that p(n),p(n)+6,p(n)+12,p(n)+18 are consecutive primes and p(n)=6*k+1 for some k, where p(n) denotes n-th prime.at n=35A090838
• Number of planar partitions of n with exactly 2 rows.at n=22A091356
• Inverse Moebius transform of Lucas numbers (A000032) 1,3,4,7,11,..at n=20A100107
• a(n) is the concatenation of its nontrivial divisors.at n=19A106708
• Records in A106708.at n=7A131983
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (-1, 1, 0), (0, 0, -1), (1, 0, 0)}.at n=10A148585
• Numbers k such that phi(k+1) = 4*phi(k).at n=4A172314
• Nonnegative integers n such that in balanced ternary representation the number of occurrences of each trit doubles when n is squared.at n=35A257867
• Number of unlabeled connected planar graphs with n edges with degree >= 3 at each node.at n=13A338594