28899

Appears in sequences

• a(n) = (4*n+1)*(4*n+3).at n=42A001539
• A Fielder sequence: a(n) = a(n-1) + a(n-2) - a(n-6), n >= 7.at n=23A001635
• a(n) = n*(n+1)^2/2.at n=38A006002
• Numbers k such that k-th and (k+1)-st term of A038593 differ by 4.at n=15A038635
• Numbers k that divide 7^k + 2^k.at n=41A045580
• a(n)= product of all odd composite numbers between n-th prime and (n+1)-st prime.at n=38A061215
• a(n) = Sum_{k=1..n} binomial(k, n mod k).at n=21A072951
• a(n) = n*(2*n+1)^2.at n=19A084367
• Group the natural numbers such that the n-th group sum is divisible by the n-th triangular number: (1), (2, 3, 4), (5, 6, 7), (8, 9, 10, 11, 12), (13, 14, 15, 16, 17), (18, 19, 20, 21, 22, 23, 24), ... Sequence contains the group sum.at n=37A086500
• Expansion of eta(q)^2 / (eta(q^2) * eta(q^4)^6) in powers of q.at n=32A134414
• Expansion of phi(x) / f(-x)^6 in powers of x where phi(), f() are Ramanujan theta functions.at n=8A134415
• Number of arrangements of n indistinguishable balls in n boxes with the maximum number of balls in any box equal to n-2.at n=36A180292
• Maximum value of k^2 * (n-k).at n=58A190798
• Number of compositions of n such that the first part is 1 and the second differences of the parts are in {-4,...,4}.at n=18A239554
• Numbers that set a new integer record for the ratio between the product and the sum of their digits.at n=31A240520
• a(n) = 19*n^2.at n=39A244631
• a(n) = (A262024(n)-1)/2: a(n)*(a(n) + 1) = d(n)*Y(n)^2 with d(n) = A007969 and Y(n) = A261250(n).at n=45A262025
• a(n) = n^2 * floor(n/2).at n=39A265645
• Least common multiple of 5*n+1 and 5*n-1.at n=34A282285
• Numbers n such that A083722(n) > 1 and A083722(n) occurs earlier in A083722.at n=19A293894