A367359 Value of A121805(k) for k = A367358(n).

1, 12, 35, 94, 135, 248, 331, 461, 530, 651, 744, 809, 908, 1068, 2070, 3039, 4093, 5012, 6013, 7042, 8026, 9055, 10058, 20047, 30092, 40017, 50008, 60054, 70063, 80065, 90022, 100058, 200051, 300060, 400093, 500028, 600074, 700013, 800022, 900055, 1000006, 2000047, 3000008, 4000061, 5000034, 6000055, 7000008, 8000056, 9000013, 10000036, 20000038, 30000029, 40000039, 50000030, 60000051, 70000064, 80000064, 90000077

Offset

1,2

Comments

These are the terms in A121805 where either the leading digit or the length has just changed.

Links

Table of n, a(n) for n=1..58.

Prog

(Python)
def agen(): # generator of terms
    n, an, y, prev_lead, prev_length = 1, 1, 1, None, None
    while y < 10:
        san = str(an)
        lead, length = san[0], len(san)
        if lead != prev_lead or length != prev_length:
            yield an
        an, y = an + 10*(an%10), 1
        while y < 10:
            if str(an+y)[0] == str(y):
                an += y
                break
            y += 1
        n, prev_lead, prev_length = n+1, lead, length
print(list(agen())) # Michael S. Branicky, Nov 22 2023

Crossrefs

Cf. A121805, A366487, A367358.

Sequence in context: A367635 A367645 A121805 * A367344 A195542 A103472

Adjacent sequences: A367356 A367357 A367358 * A367360 A367361 A367362

Keyword

nonn,base,fini,full

Author

N. J. A. Sloane, Nov 21 2023

Extensions

More than the usual number of terms are shown in order to match the data in A367358.

More terms from Michael S. Branicky, Nov 22 2023

Status

approved