45961

Appears in sequences

• Octahedral numbers: a(n) = n*(2*n^2 + 1)/3.at n=41A005900
• Stopping times.at n=9A007177
• a(n) = (2*n - 1)*(8*n^2 - 8*n + 3)/3.at n=20A063496
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having height k (1 <= k <= n).at n=49A129161
• Partial sums of sequence A177342.at n=18A178073
• Number of non-equivalent ways to choose two points in an equilateral triangle grid of side n.at n=37A227327
• Intersection of A099011 and A327651.at n=26A327652
• NSW pseudoprimes: odd composite numbers k such that A002315((k-1)/2) == 1 (mod k).at n=32A330276
• Odd composite integers m such that A006497(m) == 3 (mod m).at n=39A335669
• Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 3 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=3 and b=-1, respectively.at n=28A337626
• Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 6 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=6 and b=-1, respectively.at n=32A337629
• Composite terms in A270951.at n=37A351337
• Partial sums of the odd triangular numbers (A014493).at n=40A352116