Define a pair of sequences c_n, d_n by c_0=0, d_0=1 and thereafter c_n = c_{n-1}+d_{n-1}, d_n = c_{n-1}+4*n+2; sequence here is c_n.
A192751
Define a pair of sequences c_n, d_n by c_0=0, d_0=1 and thereafter c_n = c_{n-1}+d_{n-1}, d_n = c_{n-1}+4*n+2; sequence here is c_n.
Terms
- a(0) =0a(1) =1a(2) =7a(3) =18a(4) =39a(5) =75a(6) =136a(7) =237a(8) =403a(9) =674a(10) =1115a(11) =1831a(12) =2992a(13) =4873a(14) =7919a(15) =12850a(16) =20831a(17) =33747a(18) =54648a(19) =88469a(20) =143195a(21) =231746a(22) =375027a(23) =606863a(24) =981984a(25) =1588945a(26) =2571031a(27) =4160082a(28) =6731223a(29) =10891419
External references
- oeis: A192751