22258

Appears in sequences

• Variant on Lucas numbers: a(n) = a(n-1) + 3*a(n-2) with a(0)=2 and a(1)=1.at n=12A075118
• 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=23A192743
• a(n) = 5*2^n + 3^n + 15.at n=9A254368
• a(n) is the smallest positive composite that cannot be expressed as the sum of any subset of earlier terms and is not a multiple of any earlier term.at n=19A330071
• a(n) = 32*n^2 - 40*n + 10.at n=26A343578