Irregular triangle read by rows: row n >= 1 contains the sequence p(n), s(p(n)), p(s(p(n))), p(p(s(p(n)))), s(p(p(s(p(n))))), ..., repeatedly applying (p,s,p) to n, where p = phi (A000010), s = sigma = (A000203), stopping after the first 1 is reached. If 1 is never reached, row n contains -1.
A032452
Irregular triangle read by rows: row n >= 1 contains the sequence p(n), s(p(n)), p(s(p(n))), p(p(s(p(n)))), s(p(p(s(p(n))))), ..., repeatedly applying (p,s,p) to n, where p = phi (A000010), s = sigma = (A000203), stopping after the first 1 is reached. If 1 is never reached, row n contains -1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =2a(5) =1a(6) =2a(7) =3a(8) =2a(9) =1a(10) =4a(11) =7a(12) =6a(13) =2a(14) =3a(15) =2a(16) =1a(17) =2a(18) =3a(19) =2a(20) =1a(21) =6a(22) =12a(23) =4a(24) =2a(25) =3a(26) =2a(27) =1a(28) =4a(29) =7
External references
- oeis: A032452