130088

Appears in sequences

• Number of 2X5 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 2 zero-sum 5-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).at n=9A192700
• G.f. is the fourth power of the g.f. of A006950.at n=18A273228
• Numbers k such that 4*10^k - 89 is prime.at n=28A290475
• a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal numbers in exactly n ways, or 0 if no such number exists.at n=26A350405