53016

Appears in sequences

• Even pentagonal pyramidal numbers.at n=35A015224
• Sum of terms of n-th row of A077661.at n=46A077663
• a(n) = (n+1)*(2n+1)^2.at n=23A139757
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.at n=16A146003
• The numbers n in s=n^2 + (n+1)^2 that satisfy the requirement for two consecutive squares c,d with c<d with d-c being the sum of two consecutive squares that c<s<d will give s-c and d-s both being squares.at n=31A192743
• The greedy sequence of real numbers at least 1 that do not contain any 3-term geometric progressions with integer ratio.at n=28A235054
• a(n) = 4*a(n-4) + 6*a(n-8) + 4*a(n-12) + a(n-16) for n>15, with the sixteen initial values as shown.at n=30A238188
• Pentagonal pyramidal numbers divisible by 3.at n=31A299412
• a(n) is the number of permutations that avoid 312 and 4321 and whose square avoids 321.at n=15A381859