Triangle read by rows q(b1,b2) with 1<b1<b2 with q(b1,b2) being the least integer k equal to or greater than b1 such that all the digits of k read in base b2 are the beginning digits of k read in base b1; or 0 iff b2 is perfect power, m^k (A001597), and b1 is m^j, 0<j<k.
A380564
Triangle read by rows q(b1,b2) with 1<b1<b2 with q(b1,b2) being the least integer k equal to or greater than b1 such that all the digits of k read in base b2 are the beginning digits of k read in base b1; or 0 iff b2 is perfect power, m^k (A001597), and b1 is m^j, 0<j<k.
Terms
- a(0) =9a(1) =0a(2) =265a(3) =5a(4) =117032a(5) =2123333591a(6) =7a(7) =44a(8) =291720a(9) =10757067a(10) =57a(11) =449a(12) =16879a(13) =18042a(14) =19032324921a(15) =0a(16) =332930a(17) =0a(18) =2180306a(21) =9a(22) =0a(23) =93a(24) =839a(25) =407917265a(26) =50732175a(28) =10a(29) =10a(30) =133302001a(31) =124343a(32) =155133423353
External references
- oeis: A380564