28158

Appears in sequences

• Pentagonal pyramidal numbers: a(n) = n^2*(n+1)/2.at n=38A002411
• Even pentagonal pyramidal numbers.at n=28A015224
• Expansion of Product_{m>=1} (1+q^m)^(-13).at n=8A022608
• a(n) = self-convolution of row n of array T given by A026323.at n=6A027308
• a(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027935.at n=26A027947
• Transform of A059502 applied to sequence 4,5,6,...at n=9A059507
• a(0)=0, a(1)=1, a(2)=1, a(3)=1, a(n) = a(n-3) + a(n-4) for n > 3.at n=54A079398
• a(n) = 4n^3 + 2n^2.at n=18A089207
• a(n) = 19*n*(n+1).at n=38A173309
• Number of strings of numbers x(i=1..n) in 0..2 with sum i^3*x(i) equal to n^3*2.at n=21A184250
• Number of compositions of n with exactly one descent.at n=18A241626
• Number of length-4 0..n arrays with no repeated value greater than or equal to the previous repeated value.at n=11A269410
• Pentagonal pyramidal numbers divisible by 3.at n=25A299412
• a(n) = n*(2*(n - 2)*n + (-1)^n + 3)/4.at n=39A323724
• Indices of records in A091719 (greatest common divisors of consecutive partition numbers).at n=10A334728
• Expansion of Product_{k>=1} (1 + x^k + x^(k+2)).at n=43A345729
• Square array read by antidiagonals upwards: T(i,j) is the smallest number m such that the symmetric representation of sigma, SRS(m), has maximum width 3, consists of i parts and has 2*j occurrences of maximum width 3 in its width pattern (row m of A341969).at n=11A377667
• a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) + a(n-4) with a(1) = 1, a(2) = 2, a(3) = 4, and a(4) = 7.at n=17A385106