1005480

Appears in sequences

• 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, 0, 1), (0, -1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.at n=10A150627
• A partition product of Stirling_2 type [parameter k = 4] with biggest-part statistic (triangle read by rows).at n=25A157404
• Numbers k such that squarefree part of sigma(k) is equal to squarefree part of 2*k.at n=43A331752
• Number of even permutations on n letters that have a root.at n=8A338575
• Expansion of e.g.f. 1/(1 + x)^(1/(1 - x)).at n=10A347978
• Positions of records in A357299: integers m such that the number of divisors whose first digit equals the first digit of m sets a new record.at n=19A355592
• a(0) = 1; a(n) = Sum_{k=0..n-1} (3*k+2) * a(k) * a(n-k-1).at n=6A376086