18260

Appears in sequences

• Number of diagonal polyominoes with n cells.at n=9A056841
• Number of solid partitions asymmetric under rotation operation.at n=13A096576
• The difference between the largest part and the smallest part summed over all those partitions of n in which every integer from the smallest part to the largest part occurs.at n=49A117471
• Expansion of 1/(1 - x - x^2 + x^3 - x^7 + x^9 - x^11).at n=36A147663
• a(n) = 961*n + 1.at n=18A158414
• Number of permutations of 1..n containing the relative rank sequence { 236415 } at any spacing.at n=3A159150
• Number of permutations of 1..n containing the relative rank sequence { 351624 } at any spacing.at n=3A159173
• a(n) = n*(7*n^2 - 3*n - 1)/3.at n=20A214659
• a(n) = 4*p(n), where p(n) is the number of partitions of n.at n=29A299474
• Indices of zeros in A327442.at n=11A327443
• Infinitary perfect totient numbers: numbers that equal to the sum of their iterated infinitary totient function (A091732).at n=13A330273
• Totient numbers k such that 10*k is a nontotient.at n=2A350320
• a(n) = 3^n - 6*binomial(n,4) - 6*binomial(n,3) - 4*binomial(n,2) - 2*n - 1.at n=9A385726